1 private void BtnLoad_Click(object sender, EventArgs e)
 2         {
 3             string sPath = txtPath.Text.Trim();
 4             LoadDirAndFile(sPath, tvList.Nodes);
 5         }
 6
 7         private void LoadDirAndFile(string sPath, TreeNodeCollection treeNodeCollection)
 8         {
 9             string strDir = sPath.Substring(sPath.LastIndexOf(@"\") + 1);
10             TreeNode tNode = treeNodeCollection.Add(strDir);
11
12             //加载所有目录
13             string[] strDir1 = Directory.GetDirectories(sPath);
14             foreach (string item in strDir1)
15             {
16                 //返回目录的最后一级（名称）
17                 string sDir = item.Substring(item.LastIndexOf(@"\") + 1);
18                 TreeNode tNode1 = tNode.Nodes.Add(sDir);
19                 LoadDirAndFile(item, tNode1.Nodes);     //递归加载
20             }
21
22             string[] strFiles = Directory.GetFiles(sPath, "*.txt");
23             foreach (string item in strFiles)
24             {
25                 TreeNode tNodeFile = treeNodeCollection.Add(Path.GetFileName(item));
26                 tNodeFile.Tag = item;
27             }
28         }
29
30         private void tvList_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
31         {
32             if (e.Node.Tag!=null)
33             {
34                 //文件节点
35                 txtContent.Text = File.ReadAllText(e.Node.Tag.ToString(), Encoding.Default);
36             }
37         }